Wednesday, October 13, 2021

| October 13, 2021 | Reply

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

WEDNESDAY, OCTOBER 13, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0554E
SUNSET:  1707E

A WARMER DAY WITH GOOD VISIBILITY AND A WARM
SOUTHWESTERLY BREEZE….

Today consisted of mostly clear skies and an average visibility
of 65 miles. Conditions were warm in the lower 70’s, but humidity
continued to drop as the day went on. Wind was below 10 mph on
average with a max gust so far today of 16 mph.  

The high so far today is 73F, 11 degrees above the normal max of
62F. The low since midnight is 55F, 10 degrees above the normal
low of 45F.


PRELIMINARY STATS FOR SEPTEMBER 2021

TEMPERATURE, Deg. F
Avg. Max. 73.2 [+0.5]
Avg. Min. 57.4 [+1.8]
Mean      65.3 [+1.1]
24-hour corrected mean: 64.8
Max. for month: 82F on the 15th
Min. for month: 45F on the 29th

HEATING DEGREE DAYS
Total heating units:     46 [-54]
Total for the season:    74 [-44]
Total for last season:   98

COOLING DEGREE DAYS
Total cooling units:      62 [-12]
Total for the season:    714 [+44]
Total for last season:   830

PRECIPITATION, Inches
Total: 6.64 [+2.58]
Greatest in 24 hrs: 4.00 on the 1st-2nd

WIND, mph
Avg. uncorrected wind speed:  10.5 mph
Avg. corrected wind speed:    11.0 mph
Prevailing wind direction:   NW [11%]
Peak gust and direction:     49 ENE on the 2nd

SUNSHINE:
Campbell-Stokes card minutes: 11490 of a possible 21582, or 53%
Astronomical total minutes: 11965 of a possible 22423, or 53%


Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus
Temperature: 57F; Dew Point: 55F; Relative Humidity: 93%
Wind: W @ 7G12 kts
Sea-level pressure: 1017.8 mb; 30.06 in. Hg: rising then falling
Visibility: 65 miles, thin smoke layer
6-hr Max temp: 59F
6-hr Min temp: 55F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 65 178/57/55/2707G12/006/ FEW AC/AS THN K LYR ALQDS/ 8/070
51003 10059 20055

10 A.M.
Weather: Few altocumulus SW-NW, few cirrostratus
Temperature: 69F; Dew Point: 58F; Relative Humidity: 68%
Wind: WSW @ 7G12 kts
Sea-level pressure: 1017.5 mb; 30.05 in Hg; falling unsteadily
Visibility: 65 miles, thin smoke layer
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 65 175/69/58/2407G12/005/ FEW AC/AS SW-NW FEW CS THN K LYR
ALQDS/ 8/076 57003

1 P.M.
Weather: Few cumulus and cirrus
Temperature: 73F, Dew point: 57F; Relative Humidity: 57%
Wind: SSW @ 6G11 kts,
Sea-level pressure: 1015.5 mb; 29.99 in Hg; falling, then more slowly
Visibility: 65 miles
6-hr Max temp: 73F
6-hr Min temp: 57F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 65 155/73/57/2006G11/999/ FEW CU/CI ALQDS WND LGT/ 8/101 56020
10073 20057

SUMMARY FOR TUESDAY, OCTOBER 12, 2021

TEMPERATURE (DEGREES F)
MAX…….72     NORMAL…..62
MIN…….54     NORMAL…..45
MEAN……63     NORMAL…..54

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….. +9
TOTAL DEPARTURE FOR THE MONTH……………………..+38 [+3.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….2  DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH……………70  DEPARTURE…….-43
TOTAL HEATING UNITS FOR THE SEASON………….144  DEPARTURE…….-87
TOTAL HEATING UNITS LAST SEASON TO DATE……..197  DEPARTURE…….-53

COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….0  DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE SEASON………….714  DEPARTURE…….+39
TOTAL COOLING UNITS LAST SEASON TO DATE……..831  DEPARTURE……-117

PEAK WIND GUST (MPH):
                     Official……………….15 SW  @  8:02 P.M.
                     AEROVANE (south tower)…..15 SW  @  9:16 P.M.
                     VECTOR #2 (south tower)….16     @  8:12 P.M.
                     DAVIS #2 (south tower)…..15 SSW @  8:12 P.M.
                     ASOS………..OUT OF SERVICE D/T RENOVATIONS
                     VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
                     DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
                     RMY…………OUT OF SERVICE D/T RENOVATIONS  
                     MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………11 SW  @  9:14 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..12     @  9:14 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………12 SW  @  9:14 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY AVERAGE……..OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL…….. 4.7 SW  [112 total miles]
                     VECTOR #2……………… 5.5
                     DAVIS #2………………. 4.9 WSW
                     RMY……………..OUT OF SERVICE D/T RENOVATIONS
                     ASOS…………….OUT OF SERVICE D/T RENOVATIONS
                     VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
                     DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS   

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE….-0.17
TOTAL PRECIPITATION FOR THE MONTH………….2.10  DEPARTURE….+0.07
TOTAL PRECIPITATION FOR THE YEAR………….49.08  DEPARTURE….+8.64

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

09/01   68/56/62/-7/1.47/000/00          34 NNE AERO 37 NNE RMY N/A    
09/02   71/55/63/-6/2.53/322/41          49 ENE AERO 52 ENE RMY N/A
09/03   72/52/62/-6/0.00/735/94          23 NW  AERO 23 NW  RMY N/A
09/04   76/55/66/-2/0.00/757/97          22 WNW AERO 21 WNW RMY N/A
09/05   72/60/66/-2/0.04/008/01          27 S   AERO 29 S   RMY N/A
09/06   80/61/71/+3/0.00/557/72          24 WNW AERO 25 WNW RMY N/A
09/07   78/57/68/+1/0.00/732/95          23 WSW AERO 22 WSW RMY N/A
09/08   81/61/71/+4/0.00/646/84          43 S   AERO 45 S   RMY N/A
09/09   71/64/68/+1/0.90/000/00          33 S   AERO 36 S   RMY N/A
09/10   74/55/65/-1/0.04/595/78          31 NW  AERO 32 WNW RMY N/A
09/11   75/51/63/-3/0.00/730/96          24 SW  AERO 24 SW  RMY N/A
09/12   79/60/70/+4/0.00/591/78          33 SW  AERO 32 SW  RMY N/A
09/13   77/62/70/+5/0.06/559/74          22 NW  AERO 23 NW  RMY N/A
09/14   75/59/67/+2/0.00/444/59          23 S   AERO 25 S   RMY N/A
09/15   82/65/74/+9/T/539/72             32 SSW AERO 35 SSW RMY N/A
09/16   69/61/65/+1/0.27/037/05          24 ENE AERO 24 ENE RMY N/A TSTM      
09/17   66/60/63/-1/0.02/000/00          22 NE  AERO 23 NE  RMY N/A
09/18   74/62/68/+5/0.04/207/28          17 WNW AERO 18 WNW RMY N/A TSTM
09/19   71/57/64/+1/0.15/619/84          23 NNE AERO 24 NNE RMY N/A
09/20   71/55/63/0/0.00/647/88           20 SE  AERO 20 SE  RMY N/A
09/21   75/55/65/+3/0.00/490/67          19 SSE AERO 20 SSE RMY N/A
09/22   75/65/70/+8/0.02/153/21          30 S   AERO 30 S   RMY N/A
09/23   78/65/72/+10/0.08/298/41         36 SSE AERO 37 SSE RMY N/A
09/24   75/62/69/+8/0.02/007/01          43 SSE AERO 45 SSE RMY N/A
09/25   74/59/67/+6/0.02/303/42          14 N   AERO 14 NNW RMY N/A
09/26   73/54/64/+4/0.57/510/71          33 WNW AERO 32 WNW RMY N/A
09/27   73/52/63/+3/T/529/74             30 SW  AERO 30 SW  RMY N/A
09/28   67/52/60/+1/0.40/028/04          27 SSW AERO 25 SSW RMY N/A TSTM
09/29   63/45/54/-5/0.00/568/80          25 NNW AERO 25 NNW RMY N/A
09/30   60/46/53/-6/0.01/354/50          22 NNW AERO 21 NNW RMY N/A

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

10/01   64/44/54/-4/0.00/…/..          20 WNW AERO 20 WNW RMY N/A
10/02   73/47/60/+2/0.00/…/..          24 WSW AERO 23 WSW RMY N/A
10/03   65/55/60/+3/0.09/…/..          19 E   AERO 19 E   RMY N/A
10/04   59/51/55/-2/1.69/…/..          30 E   AERO 30 E   RMY N/A
10/05   58/50/54/-3/0.30/…/..          22 NNE AERO 23 NE  RMY N/A
10/06   69/50/60/+4/0.00/…/..          15 N   AERO 16 N   RMY N/A
10/07   73/55/64/+8/0.00/…/..          15 WSW AERO 15 W   RMY N/A
10/08   69/55/62/+7/T/…/..             24 ENE AERO 23 ENE RMY N/A
10/09   62/54/58/+3/0.01/…/..          23 E   AERO 23 E   RMY N/A
10/10   62/54/58/+3/T/…/..             22 E   AERO 21 E   RMY N/A
10/11   67/56/62/+8/0.01/…/..          20 NE  AERO 21 NE  RMY N/A
10/12   72/54/63/+9/0.00/…/..          15 SW  AERO 15 SW  RMY N/A

10/13   The low since midnight is 55F, the daily normal low is 45F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR OCTOBER 13
HIGH 84F IN 1930,1954
LOW 29F IN 2012
PRECIP 5.87 INCHES IN 1895
SNOWFALL 4.2 INCHES IN 1934
PEAK GUST 46e MPH W IN 1950

RECORDS FOR OCTOBER 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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